Can you "fix" leaking injectors?

I'm fairly certain my injectors (at least 2 of them) are leaking on my '91
200Q. I was going to just replace them with new ones, but someone reminded
me of places that clean/rebuild injectors for like $25/each.
Now, I honestly don't know enough about injectors to know what causes them
to leak. Can this be fixed? Or am I stuck with just buying new ones?
Thanks,
Rob Winchell
91 200Q